Thompson & Morgan

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Perennial & Biennial Plants


In this range you'll find an impressive selection of perennial plants and biennial plants, which are perfect for beginners and experienced gardeners alike. Also known as herbaceous plants, perennial plants live for 2 or more years and flower every year. Biennial plants live for up to 2 years, flowering profusely in their second year before setting seed and dying. Both are great for beds and spring displays and there are many delightful plants to choose from. Use the selections in the left menu to select the right plants for your garden.


For beautiful summer flowers browse our range of annual plants.



We have found 23 products.
 

Perennial 'Best Value' Collection

 Customer Rating

Fill your beds and borders with this bargain collection of herbaceous perennials. Perennial plants bloom year after year, and many can also be cut and brought into the house for beautiful flower arrangements. Height: Up to 1m (39"). Spread: 45cm (18").

  • Collection includes;

  • Lavender 'Munstead' - This neat, compact variety of English lavender bears masses of dark purple-blue flower spikes. Height: 45cm (18"). Spread: 60cm (24").
  • Digitalis 'Dalmation Mixed' - Well branched, compact, dwarf plants. Height: 50cm (20"). Spread: 40cm (16").
  • Echinacea 'Primadonna' - Beautiful pink daisy flowers with petals that radiate outwards instead of downwards. Height: 85cm (33"). Spread: 45cm (18").
  • Coreopsis 'Presto' - Neat, compact plants are smothered in golden-yellow, semi-double flowers all summer long. Height and spread: 45cm (18").
  • Verbena Bonariensis - Tightly clustered florets form glowing lavender flower heads that float atop stiffly upright, branching stems. Height: 200cm (78"). Spread: 45cm (18").
  • Scabiosa 'Blue Jeans' - Blue pincushion flowers attract bees and butterflies throughout summer. Height and spread: 45cm (18").
  • Aquilegia 'Swan' Mixed - An abundance of large flowers on upright, multi-branched stems Height: 30cm (12"). Spread: 25cm (10").
  • Geum 'Blazing Sunset' - Fully double, large scarlet blooms are borne over a long period in summer. Height and spread: 60cm (24").
  • Carnation 'Ever-blooming Mixed' (Hardy) - Richly fragrant blooms that are ideal for cutting. Height and spread: 30cm (12").
  • Armeria 'Mixed' - Long flowering plants with unusual ball shaped flower heads on thin wiry stems. Height: 50cm (20"). Spread: 30cm (12").
  • Delphinium 'Pacific Giants' - Excellent for adding structure and presence to the back of borders. Height: 150cm (60"). Spread: 75cm (30").
  • Leucanthemum x superbum 'White Knight' - Pure white single flowers are produced in constant supply throughout summer.
More info
    • 72 perennial plug plants - 6 of each variety

    • Despatch: By end of September 2015
    • SAVE £51.89  
    • £71.88 £19.99

Delphinium 'Pacific Giants'

 Customer Rating
A distinguished delphinium producing strong spikes of semi-double blooms in a dreamy blend of pink, lilac, purple, violet-blue, sky-blue and white. Delphinium 'Pacific Giants' are excellent for cutting and add structure and presence to the back of cottage garden perennial borders. Height: 150cm (60"). Spread: 75cm (30").
More info
    • 6 delphinium plug plants

    • Despatch: By end of September 2015
    •  
    • £5.99

Delphinium 'Pink Blushes'

  • New in 2015
This Pink Blush is anything but embarrassing! Glorious, tall spikes of evenly spaced, perfectly formed florets in shades of pink, from pastel to magenta! The result of many years of breeding from Terry Dowdeswell, our world-class Delphinium expert in New Zealand, Delphinium 'Pink Blushes' are strong plants with disease resistance and unrivalled garden performance. Height: 1.5m (5'). Spread: 75cm (30").
More info
    • 5 delphinium Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 10 delphinium Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £14.99

Vinca 'Collection'

Periwinkle 'Collection'

Periwinkle is one of the toughest plants you'll find, flowering relentlessly throughout the summer months in lovely shades of purple, pink and white. This vigorous low growing shrub thrives in virtually any garden position, from full sun to the darkest, shady corners. The clump forming stems provide evergreen dark green and variegated foliage that makes useful, weed suppressing ground cover. This colourful collection of Vinca major are perfect for filling those tricky areas of the garden where little else grows.
  • Collection comprises:
  • Vinca major 'Variegata' - Sky blue flowers set against variegated foliage. Height: 45cm (18"). Spread: 75cm (30").
  • Vinca minor 'Atropurpurea' - Deep plummy purple flowers. Height: 20cm (8") Spread: 50cm (19").
  • Vinca minor f. alba 'Gertrude Jekyll' - Profuse white flowers, carried on compact plants. Height: 20cm (8") Spread: 50cm (19").
More info
    • 6 vinca jumbo plug plants

    • Despatch: By end of September 2015
    •  
    • £11.99
    • 12 vinca jumbo plug plants

    • Despatch: By end of September 2015
    •  
    • £19.99

Perennial Pack A 'T&M's Choice'

Fill your beds and borders with this bargain collection of herbaceous perennials. Perennial plants bloom year after year, and many can also be cut and brought into the house for beautiful flower arrangements. Height: Up to 1m (39"). Spread: 45cm (18").

  • Collection includes;

  • Aquilegia 'Swan' Mixed - An abundance of large flowers on upright, multi-branched stems Height: 30cm (12"). Spread: 25cm (10").
  • Geum 'Blazing Sunset' - Fully double, large scarlet blooms are borne over a long period in summer. Height and spread: 60cm (24").
  • Carnation 'Ever-blooming Mixed' (Hardy) - Richly fragrant blooms that are ideal for cutting. Height and spread: 30cm (12").
  • Lavender 'Munstead'' - This neat, compact variety of English lavender bears masses of dark purple-blue flower spikes. Height: 45cm (18"). Spread: 60cm (24").
  • Delphinium 'Pacific Giants' - Excellent for adding structure and presence to the back of borders. Height: 150cm (60"). Spread: 75cm (30").
  • Leucanthemum x superbum 'White Knight' - Pure white single flowers are produced in constant supply throughout summer.
More info
    • 36 perennial plug plants - 6 of each variety

    • Despatch: By end of September 2015
    • SAVE £20.95  
    • £35.94 £14.99

Delphinium 'Rising Stars Mixed'

  • Best in class for delphiniums
We've given our customers the chance to get their hands on some very new, very different delphiniums from the world-famous 'New Zealand Hybrids' programme. There are far too many hybrids produced for our supplier to sell, so we've grouped our favourites into an exclusive 'Breeders Mixture', aptly named 'Rising Stars'! This exciting mix of delphinium flowers blends picotees, pastels, singles, doubles and frosted hybrids for a spectacular, towering display. You can even cut some blooms for a striking flower arrangement indoors. Height: 120cm (47"). Spread: 75cm (30").
More info
    • 4 delphinium Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 8 delphinium Postiplug plants

    • Despatch: By end of September 2015
    •  
    • £14.99

Delphinium 'Black Knight' (Large Plant)

Pacific Hybrid

An absolute cottage garden classic. Plant Delphiniums in bold clumps for back-of-the-border impact. Delphinium 'Black Knight' is an extra special variety with some of the deepest indigo-blue flowers, each with a black eye.

The sight of Delphiniums in a garden is simply divine. They flower from early summer, and will often flower twice. The plants are architectural and handsome, you certainly won't regret planting these handsome perennials! Height: 1.7m (5.5'). Spread: 75cm (29").

More info
    • 1 x 1 litre potted delphinium plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted delphinium plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Lupin 'The Governor' (Large Plant)

Lupinus

Add a modern twist to your traditional planting schemes with the bicolour purple and white blooms of Lupin ‘The Governor'. This tough, robust perennial produces its splendid, tall flower spikes from early summer onwards; each spire packed with pretty pea-like flowers. This cottage garden favourite that is superb for adding architectural stature to borders and woodland planting schemes. Height: 90cm (35"). Spread: 60cm (24"). More info
    • 1 x 2 litre potted lupin plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 2 litre potted lupin plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Thalictrum 'Black Stockings' (Large Plant)

Meadow Rue

The black, shimmering stems of Thalictrum ‘Black Stockings' carry plenty of fluffy mauve flowers during the height of summer. This tall, willowy perennial is ideal for filling gaps in shaded borders and woodland gardens, where the delicate foliage is a useful backdrop for shorter perennials.

Thalictrum plants combines well with almost any other plant in your shady border; from ferns to hostas or even larger-leaved plants such as Rodgersia. The foliage can also be useful to add a light airy feel to summer bouquets. Height: 200cm (79"). Spread: 75cm (30").

More info
    • 1 x 3 litre potted thalictrum plant

    • Despatch: By end of September 2015
    •  
    • £11.99
    • 2 x 3 litre potted thalictrum plants

    • Despatch: By end of September 2015
    •  
    • £19.99

Eupatorium dubium 'Baby Joe' (Large Plant)

Hemp Agrimony

Butterflies absolutely love Eupatorium; and this compact variety is excellent for smaller gardens or patio pots. The 75cm (30") plants create a dome of rich purple blooms from summer to autumn.

Eupatorium is a resilient plant, which will grow in most sites and soils, especially on wet soil. The dried seed heads give winter interest too. Height and Spread: 75cm (30").

More info
    • 1 x 1 litre potted eupatorium plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 1 litre potted eupatorium plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Vinca major (Large Plant)

Greater Periwinkle

Periwinkle is one of the toughest plants money can buy, producing plants that flower relentlessly throughout the summer. Periwinkle is a vigorous, low growing shrub, which thrives in almost any garden position, from full sun to the darkest, shady corners.

The ground-covering stems of Vinca major provide evergreen, dark green foliage that can help to beat the weeds, with inky blue flowers from April to September! Vinca are perfect for filling those tricky areas of the garden where little else grows. Height: 45cm (18") Spread: 75cm (30").

More info
    • 1 x 9cm potted vinca major plant

    • Despatch: By end of September 2015
    •  
    • £9.99
    • 2 x 9cm potted vinca major plants

    • Despatch: By end of September 2015
    •  
    • £16.99

Clematis 'Fascination'

Old Man's Beard

  • Try a different type of clematis this season
A superb non climbing, herbaceous clematis that is perfect for scrambling through shrubs, over banks and tumbling down walls. The gently scented violet purple flowers are followed by decorative seed heads for a long lasting display. Clematis 'Fascination' is particularly easy to maintain as it can be cut back to almost ground level each year. Height: 150cm (60"). Spread: 75cm (30"). Pruning group: 3.

Useful links:

How to prune a clematis

More info
    • 1 x 9cm potted clematis plant

    • Despatch:
    •  
    • £14.99
    • Out of stock
    • 2 x 9cm potted clematis plants

    • Despatch:
    •  
    • £19.98
    • Out of stock